Lycoming O-320

Airworthiness Directives; Continental Aerospace Technologies, Inc., Lycoming Engines, and Textron Lycoming/Subsidiary of Textron, Inc. Reciprocating Engines

The FAA is adopting a new airworthiness directive (AD) for certain Continental Aerospace Technologies, Inc. GTSIO-520, IO-346, IO- 470, IO-520, IO-550, LTSIO-520, O-470, TSIO-520, and TSIOL-550 series model reciprocating engines, Lycoming Engines AEIO-320, AEIO-360, AEIO- 540, AIO-320, AIO-360, GO-480, GSO-480, HIO-360, HIO-540, IGO-480, IGO- 540, IGSO-480, IGSO-540, IO-320, IO-360, IO-540, LIO-360, LTIO-540, O- 235, O-320, O-360, O-540, TIGO-541, TIO-360, TIO-540, TIO-541, TVO-435, VO-435, and VO-540 series model reciprocating engines, and Textron Lycoming/Subsidiary of Textron, Inc. IO-720 series model reciprocating engines. This AD was prompted by a report of a manufacturing quality escape of improperly lubricated roller bearings installed in certain magnetos, which may result in overheating and magneto seizure. This AD requires the replacement of affected magneto or inspection of affected magneto and, if no white grease is detected, replacement of magneto components, as applicable, and reassembly of the magneto. The FAA is issuing this AD to address the unsafe condition on these products.

Airworthiness Directives; Certain Textron Lycoming 320 and 360 Series Reciprocating Engines

This amendment adopts a new airworthiness directive (AD), applicable to certain Textron Lycoming 320 and 360 series reciprocating engines, that requires visual inspections of the inside diameter (ID) of the crankshaft for corrosion pits, and if corrosion pits are found during this inspection, prior to further flight, performing a magnetic particle inspection (MPI) or fluorescent penetrant inspection (FPI) of the ID for cracks. In addition, this AD requires reporting findings of inspections to the FAA. Finally, terminating action to the inspections of this AD is the application of a preventive treatment coating on non- corroded crankshafts to prevent corrosion. This amendment is prompted by reports of cracks in crankshafts originating from corrosion pits in the ID. The actions specified by this AD are intended to prevent crankshaft failure, which can result in engine failure, propeller separation, forced landing, and possible damage to the aircraft.

Airworthiness Directives; Textron Lycoming Reciprocating Engines

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 96-23-03 that was sent previously to all known U.S. owners and operators of Textron Lycoming IO-320, LIO- 320, AEIO-320, IO- 360, LIO-360, AEIO-360, HIO-360, TO-360, IO-540, O- 540-L, LIO-540, and AEIO-540 series reciprocating engines by individual letters. This AD requires a maintenance records check to determine if suspect high pressure fuel pumps are installed, and inspection to determine if the high pressure fuel pump has one of the suspect date codes. If the high pressure fuel pump has a suspect date code, this AD requires disassembly and inspection of the high pressure fuel pump, and, if necessary, removal from service and replacement with a serviceable part. In addition, this AD requires reporting findings of unserviceable high pressure fuel pumps. This amendment is prompted by reports of inflight failures of high pressure fuel pumps. The actions specified by this AD are intended to prevent an inflight engine failure due to fuel starvation, which could result in a forced landing.